释义 |
el·lipse \ə̇ˈlips, eˈ-, ēˈ-\ noun (-s) Etymology: alteration of ellipsis 1. : an elongated circle : a regular oval; specifically : a closed plane curve generated by a point so moving that its distance from a fixed point divided by its distance from a fixed line is a positive constant less than 1 2. : ellipsis [ellipse 1: French, F' foci; P, P', P'' any point on the curve; FP + PF' = FP'' + P''F' = FP' + P'F'] |